<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>球的体积</title>
	</head>
	<body>
		<script type="text/javascript">
			let r=5;
			let qmj=(3.14*4/3)*r*r*r
			console.log(qmj);
		</script>
	</body>
</html>
